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J. N UTTALL. Machine for Bending'Pipe Sockets, 8pc. No'. 2423?. Patent dJune 14,1881.

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Machine forBendin ipe S ts,' &0. No. 242,789. Paten' une 14, I881. v

i l ,NITEI) STATES PATENT OFFIc.

JOSHUA NUTTALL, OF ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO HIM- SELF AND JOSHUA RHODES, OF SAME PLACE.

MACHINE FOR BENDING PIPE-SOCKETS, 80c.

SPECIFICATION forming part of Letters Patent No. 242,789, dated June 14., 1881.

Application filed March 28, 1881.

To all whom it may concern Be it knownthat I, JOSHUA N UTTALL, of Allegheny city, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in MetaLBend.

ing Machines; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in whiehlike lettersindicaling like parts- Figure 1, Sheet 1, is a vertical longitudinal sectional view of my improved bending-ma-v chine, such section being taken in the plane of the line w as, Fig. 2. Fig. 2 is a plan view of the machine, with the top or cap plate removed. Fig. 3, Sheet 2, is a top-plan view of the front part of the machine. Fig. 4 is a horizontal sectional view taken in the plane of y y, Fig. 1, and showing, as also in Fig. 3, the bendingjaws moved forward as in the operation of bending; and Fig. 5, Sheet 1, is a perspective view of a socket-blank as bent by the machine.

My invention relates to mechanism for bending pipe-sockets, rings, links, and similar articles, and, in general terms, consists of a fixed or stationary mandrel, and two sliding jaws, hinged togetherat theirrcar ends, and having at their forward ends concave dies or forms, made in their adjacent side edges, adapted to inclose the blank around the mandrel. These jaws have in common an endwise-sliding motion by which the blank is given a U form around the mandrel, and they also have motion on their hinge or pivot toward and from each other, by which the open ends of the blank are closed together, as illustrated in Fig. 5.

This machine is constructed and operated as follows: y

Two plates, top and bottom, A B, Figs. 1 and 3, are secured in parallel position by intermediate or separating blocks, 0, and bolts or screws 0. A mandrel, D, is suspended by any suitable connection from the upper plate, A, beneath which an opening, I), in the lower plate permits discharge of the bent blank. Two sliding jaws, E and E, are arranged to enter and move in the space between the plates A and B and between side checks or guides F. At the rear these jaws are hinged or pivoted (No model.)

together, by any suitable joint, E such that they may have motion toward and from each other on the surface of bottom plate, B, and may also move or slide endwise in unison. Such endwise motion is com municated to the jaws by a cam, H, and yoke H, which latter abuts against the rounded ends of the jaws, as at h, and also has connection with the jaws by a strap, h. The cam H is carried by a shaft, I, which is mounted in boxes I on the bedplate B, and is driven by any suitable power connection. The form of cam H is such as to give a period of rest to the jaws when drawn back for feed, as in Figs. 1 and 2, and this may be secured by the form shown or by other well-known mechanism for imparting similar motion. Thejaws E E are made of such length that when thus drawn back sutficient space will be left between their front ends, 0 c, and mandrel D for inserting the bar from which the blank is out. In so doing the bar is entered on the side 6 and pushed endwise across the machine against a projecting stop, 0 ,011 the jaw E. The outeror forward corner ofjaw E is faced with a shear-plate, s, and a counter-shear block, .9, on the opposite side of the line of feed is set in such relation to the moving jaw E as to form therewith a shear for severing such part of the bar as may be fed past it. The block 8 may be fastened to the bed-plate B by screw-bolts r, or in other suitable way. The shear motion of jaw E is imparted by the cam H, and as both jaws are carried forward together they will bend the severed blank into U form around the mandrel D. The open ends of the blank are then closed together as follows: In the adjacent side edges of the jaws, near their forward ends, are made concave die faces or formers n a, of size and form adapted to inclose the outer surface of the bent blank. The projections a n on either side of the dies close the front and back sides of the dies, or nearly so, when the jaws are brought together, and therebyform, practically, a continuous and complete inclosure of the blank.

In order to bring the jaws together to effect such inclosure, as illustrated in Fig. 4, grooves a a and l) b are made in the plates A B, and rollers a a journaled on the upper and lower surfaces of the jaws, move in the grooves a and b, and guide the forward ends of the jaws. These grooves have a length equal, at least, to the length of endwise stroke of the jaws. To-

ward the rear the grooves are straight and parallel, or nearly so, and they are so locatedin the guiding-plates as to permit the forward points, a, of the dies to pass the center of the mandrel outside of the blank. At their front ends the grooves a a and b bin each plate converge or curve inward, thereby bringing the jaws together as they are pushed forward, with the dies '11. a surrounding the mandrel and blank, asillustrated in Fig. 4. As there shown,

the rear points, n press against the back side of the blank, holdin git against the mandrel under the forward pressure of the jaws, while the forward points, a, close down the ends of the blank, giving them a little lap, as shown in Figs. 4 and 5. This lap is secured by cutting away the forward inner portion of the righthand jaw a little, as seen in Fig. 4. If abutt weld is desired instead of a lap weld the blank is cut a little shorter and the dies in both jaws are'made substantially alike. As the jaws are drawn back by cam H they are opened or separated by the guide-grooves a and I), thus allowing the points a to pass the mandrel and the bent blank to fall through the opening I); and in order to insure quick and certain discharge of the blank any well-known and suitable stripper may be employed. When the jaws are drawn back they have a short period of rest, due to the form of the cam H, as before described. During this rest the bar is again fed forward against the stop 6 and the operation of shearing and bending is repeated. The pressure of the jaws upon the blank in this operation is in the direct line of bending, and it is applied in an effective manner and by very simple means; and especiallyin these respects this apparatus is an improvement upon the various forms of roller-dies which have been employed to close the ends of a blank by bending it around either a stationary or movable mandrel.

1. In a metal bending machine, the comb? nation of two jaws, E E, having ajoint connection at one end, and shaping-dies an, formed in the adjacent side edges at or near their open ends, with fixed mandrel D, guide-slots a and b, and rollers a a and means for giving the jaws endwise motion, substantially as described.

2. The top and bottom plates, A B, having forwardly-converging guide-slots aand b therein, with opening I) in the lower plate, in combination with mandrel D, suspended from the upper plate over opening I), hinged jaws E E, guide-rollers a a and means for giving the jaws endwise motion between the plates on either side of the mandrel, substantially as described.

3. The top and bottom plates, A B, having guide grooves or slots a and I) therein, in combination with hingedjaws E E, rollers a a cam and yoke H H, shear-block s, shearplate or cutter s on the jaw E, adjacent to s, and projecting stop 0 on the other jaw, substantially as and for the purposes set forth.

In testimony whereof I have hereunto set my hand.

JOSHUA NUTTALL.

Witnesses:

R. H. WHITTLEsEv, O. L. PARKER. 

